Did you know?Ciel's servant
The spirit that appears besides Ciel is referred as "Seven" or "Nanako". She will sometimes appear in a few seconds before a match. Ciel will call her as "Seven" when performing an Arc Drive move.

Cross Counter
There is a hidden easter egg in the original Melty Blood. If you perform Ciel's AAA while ex-shielding with Arcueid Brunestud, a picture of them punching each other will appear. Arcueid's face resemble Neko-Arc.

This feature was later removed in the later Melty Blood games.

Kohaku on wall
Kohaku can be seen stuck on a wall on Miyako's stage. This stage can be fought after the G-Akiha battle in Story Mode depending on which route your playing. Kohaku did something that transformed Akiha into a giant. The plan was to stop Shiki. It is possible that G-Akiha is behind the whole thing when she realized that Kohaku's plan was a failure.

Satsuki being ignored
While she first appeared in Melty Blood: Re-Act as a playable character, she can be found in the first original game. Note that this will only work when you either play or fight against Miyako.

She appears before a match as a black silhouette. When she is revealed, her hands are behind her back. When she brings them out, it's all covered in blood. Miyako makes an entrance and pushed down Satsuki to the ground and there she will be remained for the rest of the round.